Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    13-05-2021 12:59

General

  • Target

    a8f2b434dddca07d7e6961d8f3397d9b4fc229411bf5c6cf456db0b12cc1f81b.exe

  • Size

    517KB

  • MD5

    0d0d474a1e1a09a0d9d5e8f375438475

  • SHA1

    6e7ddc644600681ea16847191d2fe2b16375f0a7

  • SHA256

    a8f2b434dddca07d7e6961d8f3397d9b4fc229411bf5c6cf456db0b12cc1f81b

  • SHA512

    3d3a0017253463cd45a1d38a28e02276f72a8d2cf073a7b49c40251ed63e59f3e56efbe7becf3b623f8d4b24d3047aa8dc536b95937a1a6ef044fe771863402a

Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops file in System32 directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 4 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:1248
    • C:\Users\Admin\AppData\Local\Temp\a8f2b434dddca07d7e6961d8f3397d9b4fc229411bf5c6cf456db0b12cc1f81b.exe
      "C:\Users\Admin\AppData\Local\Temp\a8f2b434dddca07d7e6961d8f3397d9b4fc229411bf5c6cf456db0b12cc1f81b.exe"
      2⤵
      • Loads dropped DLL
      • Adds Run key to start application
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:1096
      • C:\Users\Admin\AppData\Roaming\DpiSdVol\bitsuser.exe
        "C:\Users\Admin\AppData\Roaming\DpiSdVol\bitsuser.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1768
        • C:\Users\Admin\AppData\Local\Temp\~3553.tmp
          "C:\Users\Admin\AppData\Local\Temp\~3553.tmp"
          4⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:316
      • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
        "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde
        3⤵
          PID:292
    • C:\Windows\SysWOW64\srdeheme.exe
      C:\Windows\SysWOW64\srdeheme.exe -k
      1⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      PID:1360

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\~3553.tmp

      MD5

      fd28ee7da4b9307e071efbd8b625795f

      SHA1

      a43bffa92ef4e0d4141327e5317d30bebfc123f7

      SHA256

      33c6ba5fff016036a33a0ce142bfccda861149341d5c3d5967bbfa883fa7c6fb

      SHA512

      9d1fb27d4b413b0bbadae8e6cb62bcaf9e71f17599c31e168a3e7b529e9e5d3c202fe26c4de2dbae40268ca448038b933e6195e0dbc240b7ddf0eb0b1aa4ea92

    • C:\Users\Admin\AppData\Roaming\DpiSdVol\bitsuser.exe

      MD5

      95e6b839210f262edcb1724c178105ff

      SHA1

      19579a71ea56c175a44f0b9e00d5c9a714f5ff44

      SHA256

      c108508a7537e587886b6172936f1322e2fe8e0159b08ee9ebb78080aa6330b7

      SHA512

      16831f59bff48224c38201903661cc2c33891c08d865191d20b9e7f8082793571f37cbee18a5efdc020a526c9490a644037ad1aa43d8d2771783d0e99c669ce9

    • C:\Users\Admin\AppData\Roaming\DpiSdVol\bitsuser.exe

      MD5

      95e6b839210f262edcb1724c178105ff

      SHA1

      19579a71ea56c175a44f0b9e00d5c9a714f5ff44

      SHA256

      c108508a7537e587886b6172936f1322e2fe8e0159b08ee9ebb78080aa6330b7

      SHA512

      16831f59bff48224c38201903661cc2c33891c08d865191d20b9e7f8082793571f37cbee18a5efdc020a526c9490a644037ad1aa43d8d2771783d0e99c669ce9

    • C:\Windows\SysWOW64\srdeheme.exe

      MD5

      0d0d474a1e1a09a0d9d5e8f375438475

      SHA1

      6e7ddc644600681ea16847191d2fe2b16375f0a7

      SHA256

      a8f2b434dddca07d7e6961d8f3397d9b4fc229411bf5c6cf456db0b12cc1f81b

      SHA512

      3d3a0017253463cd45a1d38a28e02276f72a8d2cf073a7b49c40251ed63e59f3e56efbe7becf3b623f8d4b24d3047aa8dc536b95937a1a6ef044fe771863402a

    • C:\Windows\SysWOW64\srdeheme.exe

      MD5

      0d0d474a1e1a09a0d9d5e8f375438475

      SHA1

      6e7ddc644600681ea16847191d2fe2b16375f0a7

      SHA256

      a8f2b434dddca07d7e6961d8f3397d9b4fc229411bf5c6cf456db0b12cc1f81b

      SHA512

      3d3a0017253463cd45a1d38a28e02276f72a8d2cf073a7b49c40251ed63e59f3e56efbe7becf3b623f8d4b24d3047aa8dc536b95937a1a6ef044fe771863402a

    • \Users\Admin\AppData\Local\Temp\~3553.tmp

      MD5

      fd28ee7da4b9307e071efbd8b625795f

      SHA1

      a43bffa92ef4e0d4141327e5317d30bebfc123f7

      SHA256

      33c6ba5fff016036a33a0ce142bfccda861149341d5c3d5967bbfa883fa7c6fb

      SHA512

      9d1fb27d4b413b0bbadae8e6cb62bcaf9e71f17599c31e168a3e7b529e9e5d3c202fe26c4de2dbae40268ca448038b933e6195e0dbc240b7ddf0eb0b1aa4ea92

    • \Users\Admin\AppData\Roaming\DpiSdVol\bitsuser.exe

      MD5

      95e6b839210f262edcb1724c178105ff

      SHA1

      19579a71ea56c175a44f0b9e00d5c9a714f5ff44

      SHA256

      c108508a7537e587886b6172936f1322e2fe8e0159b08ee9ebb78080aa6330b7

      SHA512

      16831f59bff48224c38201903661cc2c33891c08d865191d20b9e7f8082793571f37cbee18a5efdc020a526c9490a644037ad1aa43d8d2771783d0e99c669ce9

    • \Users\Admin\AppData\Roaming\DpiSdVol\bitsuser.exe

      MD5

      95e6b839210f262edcb1724c178105ff

      SHA1

      19579a71ea56c175a44f0b9e00d5c9a714f5ff44

      SHA256

      c108508a7537e587886b6172936f1322e2fe8e0159b08ee9ebb78080aa6330b7

      SHA512

      16831f59bff48224c38201903661cc2c33891c08d865191d20b9e7f8082793571f37cbee18a5efdc020a526c9490a644037ad1aa43d8d2771783d0e99c669ce9

    • memory/316-68-0x0000000000000000-mapping.dmp

    • memory/1096-59-0x0000000075281000-0x0000000075283000-memory.dmp

      Filesize

      8KB

    • memory/1096-60-0x00000000002E0000-0x0000000000375000-memory.dmp

      Filesize

      596KB

    • memory/1248-74-0x00000000024C0000-0x0000000002503000-memory.dmp

      Filesize

      268KB

    • memory/1360-75-0x0000000000420000-0x00000000004B5000-memory.dmp

      Filesize

      596KB

    • memory/1768-63-0x0000000000000000-mapping.dmp

    • memory/1768-73-0x0000000000070000-0x00000000000B0000-memory.dmp

      Filesize

      256KB